RHJP IDM throws NullPointerException for an Entity which was inserted before

Issue

• I get a NullPointerException frequently. But it is also intermittent.

16:32:53,458 INFO  [org.exoplatform.services.organization.idm.UserDAOImpl] (http-/10.128.242.147:8280-2) Cannot update password: user01; : java.lang.NullPointerException
        at org.picketlink.idm.impl.store.hibernate.HibernateIdentityStoreImpl.updateCredential(HibernateIdentityStoreImpl.java:2691)
        at org.picketlink.idm.impl.repository.WrapperIdentityStoreRepository.updateCredential(WrapperIdentityStoreRepository.java:374)
        at org.picketlink.idm.impl.api.session.managers.AttributesManagerImpl.updatePassword(AttributesManagerImpl.java:565)
        at org.exoplatform.services.organization.idm.UserDAOImpl.persistUserInfo(UserDAOImpl.java:569) [exo.portal.component.identity-3.8.16.Final-redhat-1.jar:3.8.16.Final-redhat-1]
        at org.exoplatform.services.organization.idm.UserDAOImpl.saveUser(UserDAOImpl.java:174) [exo.portal.component.identity-3.8.16.Final-redhat-1.jar:3.8.16.Final-redhat-1]
        at com.sample.PasswordResetClient.changePassword(PasswordResetClient.java:114) [classes:]
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